Skip the auto shop - Our mechanics make house calls

Q: Engine caps at 3000 rpm's, no cel light, and no smoke of any color. Uncaps when restart the engine.

asked by on

I recently found out that my Mazda 3 sport TS2 Diesel 1.6l is capping the revs at 3000 at some points, I am not too sure but I think it happens when going uphill (slight not steep).

I experiences a bang while on the highway and loss of power but car kept on going, no smoke, no cel light (the led works). It had a hard time getting back home, struggling to make it past 60mph foot full on gas pedal etc. Next day car was fine, revved up above 3k, driving normal. Until it caps again, but doesnt struggle as much. In fact it behaves normally until you want to go on higher gears (4rth and above when it's capped, when it's not yet capped it goes like an arrow). THe cel light has never gone off, no smoke all over the place white or black.

Reset the ECU, Cleaned the MAF sensor and the car seemed like a totally different car, going super smooth. After some hours the car feels almost like preclean again. No idea what could be wrong

My car has 21000 miles.
My car has a manual transmission.

Hi there. There could be an issue with the fuel system causing the engine to stumble and bang at times. Check the fuel / water separator on the vehicle and see if its been replaced before. If not, then the filter needs replaced. Check the fuel filter and see when it has been replaced. If the filter is old, then it would need replaced. Water in the fuel or a dirty fuel filter will cause the engine to stumble from time to time. If you need further assistance with the fuel system, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Engine caps at 3000 rpm's, no cel light, and no smoke of any color. Uncaps when restart the engine.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car is a 1974 Ford Bronco. I was driving doing about 35 when my car suddenly sputtered and died. Wont idle without foot on gas

Hello, thank you for writing in. The vehicle may be having one of several issues. Due to the lack of self diagnostic programming on the vehicle, it is going to be a process of elimination. You are going to want...

Q: Misfire

Hi there. From the description you have given, your vehicle has a combination of problems. The erratic tachometer/rpm gauge could be at fault. The tachometer signal from the ignition module could be erratic and may also be the cause of...

Q: Beeping sound???

Hello, and thank you for writing in. The vehicle is likely experiencing some kind of sensory error. It will need to have its computer scanned for diagnostic codes. If there are no codes present, you will want to look into...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...